Stone-dressing machine



(ModeL) 8 Sheets-Sheet 1..

T. H COOK. Stone Dressing Machine. No. 237,961. v Patented Feb. 22,1881.

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N.PETERS. PHOTO-LITNOGRAPHER, WASHINGTON, u C.

(Model) 8 Sheets-Sheet; 3. T H 000K Ston e Dressing Machine PatentedFeb; 22,1881.

NPEI'ERS. PHOTOQLITN'OGRAFHER, WASHINGTON. 0 CV NITED- STATES ATENTrrrcn.

THOMAS H. COOK, OF OWEGO, NEW YORK.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 237,961, dated February22, 1881.

Application filed December 13, 1880.

To all whom it may concern:

Be it known that I, THOMAS H. 000K, a citizen of the United States,residing at ()wego, in the county of Tioga and State of New York, haveinvented certain new and useful Improvements in Stone-Dressing Machines;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure l of the drawings represents a side elevation of my invention,with a portion of the frame-work broken away; Fig. 2, an end view of thesame; Fig. 3, a side elevation, reverse of that shown in Fig. 1; Fig. 4,adetail View, partly insection, of the carriage andvertically-adjustable well; Fig. 5, a perspective view, in detail, ofthe adjustable head, toolholder, and pivoted support, to which the headis connected; Fig. 6, a detail view, partly in section, of the hollowpost, sliding cross-bar, cord, and weight; Fig. 7, a detail view of theslide for operating the rack. Fig. Sis a detail side view of the innerportion of the frame work, showinga portion of the operating mechanism;Fig. 9, a top-plan view of the rack with the frame-work in section; Fig.10, a perspective view of the frame with pivoted levers, to which thestone to be polished is connected. Fig. 11 is a detail view of a portionof the operating mechanism.

The present invention has relation to certain new and usefulimprovements in machines for dressing stone, and to grind and sharpenthe picks or knives used in the same; and it consists in the details ofconstruction of the various parts of the machine, as fully shown in thedrawings, and hereinafter described.

- In the accompanying drawings, A represents the frame-work, to whichthe several parts of the machine are connected and supported. To thisframe is journaled a horizontal shaft, 13, to which is connected atriplever, 0, having secured to its free end one or more knives, a. Tothe opposite end of the lever O is a jointed foot, 1), against which isbrought a cam-shaft, D, rotated by belt and pulleys, vhereinafterdescribed. This jointed (ModeL) foot 11 is for the purpose of raisingthe stroke of the trip-lever O; or, in other words, regulating theextent of stroke, by either turning the foot down or up. as the case maybe,

said trip-lever being moved laterally along the shaft B, or from side toside by means of a screw-rod,c, provided upon its end with a suitablecrank for turning it, the screw-rod passing through the side of thetrip-lever near its end. To increase the power of the stroke there is aspring, (I, secured to the end of the shaft B, the upper or free end ofthe spring resting against an upright lever, c, pivoted at its lower endto the side of the horizontal crosspiece fof the frame-work A, so thatwhen the lever is thrown forward more pressure is eX- erted upon thespring.

A rack, E, as illustrated in Fig. 9, slides horizontally in the upperportion of the frame A, the notches of said rack engaging with the levere by the pressure of a suitable spring, 9, which forces the rack forwardwhen released, as will be hereinafter more fully described.

Under the free end of the lever O is a crossbar, F, upon which the leverrests and is stopped when not stopped by the knives coming in contactwith the stone, said cross-bar moving or sliding vertically within theframe A by means which will be presently described.

To the end of the sliding bar F is engaged a lever, h, as shown in Fig.8, the same being connected with a slide, 6, and pivoted to avertically-adjustable bracket, is, said slide having on one side anincline plane, by which means the rack E is drawn back when. the bar Fis thrown up. The lever 6 can also be released from the rack E bydrawing it back by hand, when required. Upon the opposite end of thecross-bar F is secured an upright, l, which is incased in a hollow post,G, and to which is attached a cord and weight, m a, said cord passingover suitable pulleys, also incased with the cord and weight in thehollow post, by which the cross-beam F is raised. When the machine isput in operation this cross-bar F is shoved down and is held there by apin, 0, upon the end of a sliding beam, H, which engages with a notch inthe side of the upright Z, and held there by a spring, p, at theopposite end of the beam. As the carriage, which will be hereinafterdescribed, is fed along and it reaches its extremity a stop orprojecting portion thereof comes in contact with the shoulder 1', uponthe inner side of the sliding beam H, forcing the beam back andreleasing or disengaging the pin 0 with the notchin the upright l, whichis immediately thrown up by the weight a.

The carriage upon which the stone is placed is represented at I, and isfed forward by a rack, s, secured to the side thereof, which engageswith a pinion, t, the latter being operated by a ratchet motion workingfrom arm a on the shaft B, and the carriageis run back by throwing onthe belt K from pulley L to pulley M, the cross-bar F being then shoveddown, and the work is again proceeded with.

To dress various thicknesses of stone the carriage I is made to rise orlower by means of four screws, r, operated together by a series ofcog-wheels, to, moved by a crank upon the end of a shaft. Various othermeans, however, may be employed for rendering the carriage verticallyadjustable, as found desirable, as I do not desire to confine myself tothe construction shown neither do I to the means shown for feeding thecarriage along and upon its track q, as it is evident that other meansmay be substituted without departing from the principle of my invention.

Upon the inner side of the carriage-bed may be arranged a loose plank tocover a well,which can be removed for the purpose of plaein g a stone upedgewise, the well N also being adapted to be raised or lowered by arack and pinion or other suitable means adapted to the purpose.

\Vhen it is desired to polish the stone a holder. for the same isprovided,which consists of the frame 0, for connecting thereto thestone. This frame has pivoted to it levers P, having detachable sectionsQ, by which the free ends of said levers are connected to eccentrics yupon the cam-shaft D, whereby a reciprocating motion is imparted to theframe.

Upon the opposite side of the frame-work A is an attachment for grindingthe picks or knives used in dressing the stone.

The grindstone represented at R is driven by a belt, a, passing over thepulley b on the shaft of the grindstone and up over a pulley, 0, uponthe end of the cam-shaft D. Over the grindstone It is a movable head, S,as illustrated more fully in Fig. 5, to which the picks or knives a areconnected when required to be ground. One end of this head S rests upona sliding frame, T, which can be raised or lowered by a screw-rod,(l,while the opposite end of the head S is adjustably connected to apivoted support, U,the latter having suflicient lateral play to allowthe head to traverse from side to side and thereby keep the face of thegrindstone true. This lateral motion is pro duced by the arms 0projecting radially from a drum, f, upon a shaft, g, said arms 0striking at their inner faces upon either side of the head Salternately, or rather against checkpieces h, connected to the sides ofthe head. The shaft g is given the required rotary motion by a cord orbelt, 7;, passing over a pulley, 5, upon said shaft, and over a pulley,1, upon the shaft of the grindstone. Thus, by the em-.

ployment of the cheek-pieces, together with the radial arms, a lateralreciprocating motion is imparted to the head which carries the pick ortool to be ground. The cheek-pieces h are made adjustable by a slidingwedge, m, so as to produce more or less travel to the head S, and thetool-holder V is made to rise or lower by the elongated slotn andset-screw 0. The head S is also adjustable in a direction to or from thepivoted support U by slot and setscrew 12 q, the object being to adaptit to the stone as the latter wears away.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. In a stone-dressing machine, the trip-1ever (3, carrying knives orpicks a, and jointed foot I), in combination with the cam-shaft D, saidlever being adjust-ably connected to the pivoted shaft B, substantiallyas and for the purpose set forth.

2. The rack E, spring 9!, lever c, and spring 61, in combination withthe pivoted shaft 13, adjustable lever O, havingjointed foot I), and thecam-shaft D, substantially as and for the purpose specified.

3. The combination, with the rack E, constructed to operate asdescribed, of the sliding cross-bar F, lever h, and slide i,substantially as and for the purpose described.

4. The pivoted shaft B, carrying the triplever O, with knives or picksa, in combination with the sliding cross-bar F, upright l, and thesliding beam H, with pin 0, and spring 1), substantially as and for thepurpose set forth.

5. The combination, with the carriage I, and means, substantially asdescribed, for propelling it, of the cross-bar F, cord and weight on n,upright l, sliding beam H, with pin 0, spring 1), and shoulder 1',substantially as and for the purpose specified.

6. In a stone-dressing machine, the carriage I,provided with screws v,and series of toothed wheels 10, arranged to operate as described, incombination with the well N, connected to the carriage, and capable ofvertical adjustment with relation thereto, substantially as and for thepurpose set forth.

7. In a stone-dressing machine, the combination, with the shaft D,having eccentrics y, of the frame 0, for holding the stone, said framehaving pivoted to it levers I, with detachable sections Q, substantiallyas and for the purpose described.

8. In a stone-dressing machine, the combination, with thehorizontally-adjustable head S, for holding the knife or pick to beground, provided with adjustable cheek-pieces h, of the radial arms a,and the pivoted support U,

the Whole constructed to operate substantially In testimony that I claimthe above I have 10 as and for the purpose set forth. hereuntosubscribed my name in the presence 9. The head S, adjustably secured tothe of two Witnesses.

pivoted support U, and carrying tool-holder V,

adjustable thereon, and the adjustable cheek- THOMAS COOK pieces h, incombination with the radial arms Witnesses:

e, and the vertically-adjustable frame T, upon T. B. ARMSTRONG,

which the free end of the head S rests sub- B. G. SPRINGSTUN.

stantially as and for the'purpose specified. I

